Loose-sheave-spool rotary table



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L LAHSEN. LOOSE SHEAVE SPOOL ROTARY TABLE.

AFPLICAI'UN FILED JUNE l. i920. 1,366,571, Patented Jan. 25, 1921.

2 SHEETS-SHEET I.

FIG-.I

L. LARSEN.

LoosE sHEAvE sPooL RoTARY TABLE.

APPLICATION FILED JUNE I, |920 i Patented Jan. 25, 1921.

2 SHEETS-SHEET 2.

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Mam

LEE LARSEN, i013 TAMPICO, MEXICO.

LOOSE-SHEAVE-SPOOL ROTARY TABLE.

Specification of Letters Patent. Pateemtqjl Jan.,` 25, i921,

Application filed .Tune 1, 1920. Serial No. 385,847.

To all whom it may concern Be it known that I, LEE LARsnN, a citizen of the United States of America, residing at Tampico, in the State of Tamaulipas, Republic of Mexico, have invented certain new and useful Improvements in Loose-Sheave- Spool Rotary Tables, of which the followinv is a specification.

y invention relates to rotary boring for screwing in hollow or solid concrete or iron piles and any kind of pipes, as well as funnel shaped piles, pipes or cylinders. Also in such cases where boring through the strata is necessary for sinking pipes for instance in oil fields, my invention will offer great advantages.

The objects of my invention are to secure an exact and safe operation in placing piles,

- pipes or the like, of any diameter, and to be connected up -all through until the next set is ready.

provide means by which is obtained a strong, firm and even hold all around these elements without harming the material to be put down. Means are also provided to permit the couplings or flanges on pipes or the like to slip right through between the spools, in order to secure a continuous operation, so to allow that as many pipes as desired can at one time and to let them Furthermore, means are provided so that a quick and easy change of the spools in case of necessity can take place.

In the accompanying drawings, two preferred forms of the invention are illustrated. In these drawings, Figure 1 represents a top view of a four spool turning table, and Fig. Y

2 is an elevation of the same, partly in section. Fig. 3 is a plan view of a modification of my invention with two loose sheave spools; Fig. l is a side elevation of this mechanism, and Fig. 5 is an elevation of the rotary table, showing the spool in position, and also indicating by dotted lines the apparatus open for replacing spools, etc. A

In the form of the invention shown in Figs. 1 and 2, the rotary table 1 is provided ing connected to an ordinary turn-table roL tary of the same construction as used for drilling purposes, by castings 3 and 4, and located'in such a manner that they can grip with the sheaves evenly around on the material to be screwed down. 'Ihe spools are formed by a certain number of sheaves 2, according to the diameter of the element to be gripped. They can either be made of with four loose sheave spools, each spool be;

metal or wood, but if wooden sheaves are used, a hard wood should be employed, and 1n all cases a metal sheave should be used on each end of ,the spool, so as to protect the wooden sheaves from breakage. rIhe sheaves are of various diameters according to the shape and `size of the material in operation, and can be faced at lany thickness according to the number of sheaves necessary for the purpose. The edges of these sheaves can be provided with furrows 2a, to give more friction and to get a better hold of the material under work. All the sheaves have grooves 5 as shown in Fig. 2, to allow them to turn independently on the brass pipe 7, which is crimped on both ends, forming a collar sheaves' together and in place and with enough space to allow them to turn freely. The safety collars or washers 6, which are placed at each end of the spool, are conveniently split in two halves (see Figs. 4 and 5), and held together' by stud bolts 6a, so that they can easily be taken apartand lifted up and put back, when the spools have to be taken off for instance to be changed for other sizes of sheaves, and will also help to keep the sheaves together.

Each spool, thus formed by sheaves of various diameters according to the size and shape of the elements to be screwed down, is placed on a shaft 8 which'can rest with its ends in the pedestals 9;.these pedestals or bearings can freely travel on large screws 10, located in the fixed iron blocks or castings 3 and l, in order to adjust the position of the spools. For this .purpose the screws 10 are provided with a square head 11 which serves as nut for the double faced wrench lever 12, which lever after beingused for regulating the position of the spools is placed over the nuts 11, thus preventing the screws 10 from turning out of position, but will keep the spools firm up to the element to be screwed down.

The rotary table is turned as'usual by means of the cog-wheel 14, which is turned by shaft 13. However, in case a large cylinder has to be screwed in, it would be advisable to use a turn-table with two shafts, as shown in Fig. 1,'so' as to give more power and equalize the strain onthe table 1.

It '1s evident that by employing these loose spools, the elements to be screwed down can be xed between the spoolsin avery strong and even hold by means of the sheaves which 7a, 'ust sufficient to keep.` theare formed in lines exactly according to the diameter and shape of said element, and the material is now secured from being cracked or damaged, as often has been the case by the fermer known means for said purpose.

Referring to the small rotary illustrated in Figs. 3 to.5, this apparatus should oli'er great advantages for instance for sinking pipes in oil fields, as it permits the unions or flanges on the pipes to slip right through between the spools by loosening the springs 22a so as to give space enough to permit the said unions or flanges to pass through without stopping.

In this modified form of my invention the spools formed by the sheaves 2 are placed in the movable pedestals 15 on theshaft 8 'in the same manner as described for the four spool rotary, but one end of the shaft can conveniently turn on the pin 16 in order to easily move the shaft up to the position as shown by dotted lines in Fig. 5 for replacing spools if desired or necessary. f The adjustment of the'spools can be effected by means of shafting 17 which rests in fixed blocks 18 and runs right through the bearings 15. This shafting 17 is threaded in both ends, rightand left, according to the movement required, and by moving the ratchet 19 with its cog-wheels 20 which turn the shafting 17, the iron block 2l placed in the threaded part of the sha-fting 17 will push up against the springs 22b thus pressing the spools together until they have gotten a firm and strong hold on the pipe under work. -I flanges or unions have to pass the spools, the ratchet is given a little turnv and the springs 22a will permit .the spools toopen and give suliicient space for this part of the pipe to pass between the spools, and this is continued in the same manner until the entire pipe is put in place.

The Z-shaped irons `23 serve as uides for the pedestals on bearings 15 an the iron blocks 21, so that the operation can be effected in a safe and easy way.

This apparatus as shown in Fig. 3 will grip almost all around the pipe, and will give an even and strong grip Awhich cannot do any damage Ato the pipe, as the sheaves turn all independently, and there will be no more dra on one vthan on the others as, all the sheaves turn absolutely free, and by the simple mechanism of the springs the apparatus can open and close the spools almost without stopping the machine. d

By adopting this loose sheave spool r0- tary with either two, three or more sets of spools, it will render great utility to any placewherelarge columns or thelike have to be put in, as this apparatus will turn around at a good speed and ltake a strong,

firm and even hold all around the elements,

and when irst screwed up tight it cannot slip nor do any damage to thel element in work, as is the case with the now employed rollers in` use 'at the present, which have been the cause of constant trouble and also many cylinders and pipes have been cracked` departing from the lspirit and scope of this invention, and I do not wish to be limited to the details of construction as set forth in this specification.

I-Iaving thus described my invention, what I claim as new and desire to secure by Letters Patent is as follows:-

1. In a rotary table for screwing or twist- `ing down concrete or iron piles or pipes to any desired place, loose sheave spoolsixed to said table to clutch the element to be twisted or screwed down, said spools comprising sheaves of various diameters to grip and fit said element; a brass pipe, said sheaves 'being turned with freedom of movel ment on said pipe; means to adjust the distance between said spools; and guiding means for said spools to and from the said element. A

2. `A rotary table for screwing or twisting down concrete or iron piles or pipes to any desired place of the class described, as set forth in claim 1, and means for adjustably positioning said loose shea-ve spools from and toward the element to be twisted or screwed down, for adjusting the distance between said spools.

v 3. A rotary table for screwing or twisting down concrete or iron piles or pipes to any desired place of the class described, as set forth in claim 1, and means for guiding said loose `sheave spools,'said guiding means disposed on each side of said poolsfor effecting the adjustment of the distance between said spools.

In testimony whereof I allix my signature in presence of two witnesses.

LEE LARsEN,

. Witnesses:

F. MATHEsoN, v MIGUEL SnLKowiTz, Jr. 

